/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Classes/AchievementBlueprintLibrary.h
Gets the status of an achievement ID (you must call CacheAchievements first to cache them)
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Meta=(WorldContext="WorldContextObject"), Category="Online|Achievements") static void GetCachedAchievementProgress ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, [APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * PlayerController, [FName](API\Runtime\Core\UObject\FName) AchievementID, bool & bFoundID, float & Progress )